Food waste has become a serious matter which negatively impacts the environment worldwide. This raises the issue of managing food waste more efficiently, which in many cases can be aided with technology, and there has been previous research suggesting possible solutions. On a household level, food waste could be better managed by providing individuals with visual representations or summaries of how much they waste, and hopefully motivating them to waste less. However, typicalcharts used for visualizing data often fail to motivate users. Abstract visualizations might have a better chance at doing so. The focus of this master thesis is to design and develop a responsive web application which helps users keep track of their food purchases. Using the application, users can create product lists and perform two actions on products: consuming and wasting. The app prototype aims to increase an individual’s motivation towards wasting less food by providing a virtual “tree” visualization with similar features to a real tree such as branches and leaves. However, instead of growing depending on its’ environment like a real tree would, this virtual “tree” representation would grow based on the user’s actions: subject to how much food is consumed or wasted, the virtual tree will grow further or gradually start withering. A user study was conducted which involved a questionnaire surveying the general attitudes and practices of the participants regarding their household food waste, which was sent to participants both before and after using the resulting prototype.This enabled for relevant comparisons to be made between the user attitudes before and after trying the prototype. Furthermore, at the end of study, two user groups could be identified: most active participants and less active participants. This classification was made based on the activity logs gathered from the application database, where “most active” refers to participants that used the application regularly during the evaluation period and “less active” means the participants with very little or no activity recorded in the database. A final questionnaire was developed in two variants for collecting user feedback, tailored for the two groups identified: most active participants and less active participants. These surveys were shared with a group of participants who had agreed on using the resulting prototype for a period of at least two weeks. The results of the user study suggested that users were positive to the concept of the prototype and most users showed a keen interest in future improvements of the application. It is hoped that this work makes a relevant contribution to the areas of household food waste management, digital inventories, and web technologies, specifically web applications.

No description available.

This project investigates the feasibility of migrating from an SQL database utilizing complex stored procedures to a NoSQL database, specifically focusing on the Saab application BAAS. The motivation behind the investigation is that the stored procedures are complex to maintain. The aim is to determine whether such a migration can simplify the database structure while maintaining acceptable performance levels. The study involves developing a proof of concept by translating a frequently used SQL stored procedure into application-sided logic implemented with MongoDB, a document-oriented NoSQL database. Performance tests comparing execution times of SQL stored procedures and the NoSQL alternative showed that while SQL stored procedures are faster due to primarily pre-compilation and optimized indexing, the NoSQL solution achieves acceptable execution times and offers enhanced maintainability and flexibility. This report provides a detailed evaluation of the potential benefits and drawbacks of migrating to NoSQL, emphasizing the importance of optimizing indexing strategies to close the performance gap. The findings suggest that, despite the time investment required for migration, the reduction in complexity and improved maintainability may justify the transition for organizations facing similar challenges.

No description available.

The objective of this master thesis is to design and develop a real-time storage system for geographic data from driving school trips. The system provides tools for analysis and evaluation of practice trips. This system is an extension of the DoAutoskoly.cz project which is described in the text. The next part contains an introduction to geographical data, spatial data and available databases with spatial extensions. The understanding to spatial databases is very important for the system design, an explanation of a solution for a database layer and implementation of major parts. Solution for a graphical view of the results and possible extensions of the system are described in the last part of this thesis.

Thesis describes design and implementation of a web browser game, which can be played by multiple players via the internet. The main goal is to manage the economy, although players can cooperate (trading) or play against each other (battles). NoSQL database is used for persistent storage of progress, which is also described in the thesis. Apart from human players there are also agents/bots, which play the game autonomously via state machines generated by genetic algorithms. Paper describes design and functionality of either the genetic algorithms, but also the state machines.

Zenon AB is an it-company of which, this thesis was made in collaboration with. Zenon AB has clients that generate large amounts of data, therefore it is important for Zenon AB that they make competent choices of database management systems (DBMS) when designing systems for their clients. This thesis will therefore entail research carried out into the comparison of DBMS. Nowadays, there exists a large variety of DBMS. Despite this, there seems to be a lack of comparisons between types of DBMS and therefore a lack clarity of when each type should be used. Thus, this thesis aims to highlight these differences of DBMS types by creating a tailored test for each DBMS type and compare how each type performs in each-others area of specialization. This process will show how big the differences can be and highlight the importance of the choice of DBMS. The time it takes, and how simple DBMSs are to implement seems to be a factor most developers take into consideration when choosing DBMS but there is little research on how to compare the aspect. Therefore, this thesis will investigate the viability of a method to compare how easy the DBMSs are to implement into systems by querying programming help forums such as Stackoverflow. / <p>Examensarbetet är utfört vid Institutionen för teknik och naturvetenskap (ITN) vid Tekniska fakulteten, Linköpings universitet</p>

<p>The web and digital technologies have been continuously growing in the recent five years. The data generated from the Internet of Things (IoT) devices are heterogeneous, increasing data storage and management difficulties. The thesis developed user-friendly data management system frameworks in the local environment and cloud platform. The two frameworks applied to two applications in the industrial field: the agriculture informatics system and the personal healthcare management system. The systems are capable of information management and two-way communication through a user-friendly interface. </p>

This work deals with the design of distributed repository aimed at storing digital forensic data. The theoretical part of the thesis describes digital forensics and what is its purpose. There are also explained Big data, suitable storages, their properties, advantages and disadvantages, in this part. The main part of the thesis deals with the design and implementation of distributed storage for digital forensic data. The design is also focused in suitable indexing of stored data, and supporting new types of digital forensic data. The performance of implemented system was evaluated for chosen type of digital forensic data PCAP files.

This work deals with electronic document management systems (EDMS) from the perspective of selected knowledge areas of project management processes. The aim of this thesis was to create an EDM system based on an appropriately selected EDM model, which would assist in the management of documents that arise during management processes in selected areas of project management (quality, human resources and communication within the project) with the possibility of extending to other knowledge areas.